After pregnancy progesterone values will increase with the duration of pregnancy and show a steady upward trend in stages, and may fluctuate on a plateau in the short term. In the early stage of pregnancy blood progesterone is in the range of 63.6-95.4 nmol/L, in the middle stage of pregnancy in the range of 159-318 nmol/L, and in the late stage of pregnancy in the range of 318-1272 nmol/L. During early pregnancy progesterone is mainly from the corpus luteum, and in the middle and late stage of pregnancy progesterone is mainly secreted by the placenta. If the progesterone does not rise after pregnancy, consider that the fetus is underdeveloped or there is an aura of miscarriage, and take progesterone or didrogestrel for fetal preservation treatment under the guidance of the doctor. If if abdominal pain and bleeding, it is considered to be an aura of miscarriage and needs to go to the hospital promptly.